Cement-mixer.



No. 807,899. PATENTBD DEC. 19, 1905.

G. L. BALDWIN.

CEMENT MIXER.

AAAAAAAAA 0N FILED JULY12,1905

W 7% WM CHARLES 13.5AZZ7WJM I PATENT OFFICE.

CHARLES L. BALDWVIN, OF WATERLOO, IOWA.

CEMENT-MIXER.

Specification of Letters Patent.

Patented Dec. 1905- Application filed July 12,1905. Serial No. 269,340.

To aZZ whom it may concern:

Be it known that 1, CHARLES L. BALDWIN,

- a citizen of the United States of America, and

a resident of WVaterloo, Blackhawk county, Iowa, have invented certain new and useful Improvements in Cement-Mixers, of which the following is a specification.

My invention relates to cement-mixers; and the object of my invention is to provide a machine which will efliciently mix together the constituent elements of cement or concrete in a short time, so agitating the materials as to thoroughly compound them into one homogeneous mass. This object I have accomplished by the mechanism which is hereinafter described and claimed and which is illustrated in the drawings hereto annexed, in which Figure l is a vertical longitudinal section along its axis of myimproved cement-mixer. Fig. 2 is an end elevation thereof, and Fig. 3 is a plan view of the under side of the removable coverof the mixing-drum.

Similar letters refer to similar parts th roughout the several views.

A horizontal rectangular frame g supports the uprights c and e, the latter being provided with bearings (Z and (Z, respectively. The

pipe 0 is fixed within these bearings, the endv plates of the mixing-drum a being perforated, so as to rotate about it. On the upright e is placed a bearing a for the reception of a stubshatt 0, provided on its outer end with a crank it and on its inner end with a pinion f, the latter intermeshing with a gear-wheel b, which is fixed to one head of the mixing-drum a.

The mixing-drum a has a removable cover 8, (shown in Fig. 3,) whose fastening means consists of two horizontally-projectable bars a; and a, working between the cover and the lugs 20 and 20, respectively, and which are projected or withdrawn by means of the centrally-pivoted lever a, attached to their inner ends, respectively. This inner lever a is centrally fixed on the lower end of the shaft 00, which passes through an opening in the cover s and is manipulated by means of the handlever p.

The frame 9 is supported on two rear uprights Z and Z, in which the wheels on and m are pivoted, and by a front leg it, attached by means of a hinge z'.

The middle portion of the pipe 0 is perforated at 2.. Said pipe is closed at the end fixed in the support (Z; but its other end is open and communicates with any suitable source of water-supply through a coupling a and pipe 3 or otherwise, as desired.

The large cones q and (1, extending well within the mixing-drum a, are fixed to the inner sides of its heads and rotate with the drum about the pipe 0 and serve to deflect the contents toward the center and the axis of the drum. 1 have also affixed to the inner wall of the mixing-drum flange-sections '1' 1', whose flanges project toward the axis obliquely, as shown. The function of these flanges is when the mixing-drum a is turned in one direction to aid in diverting the contents thereof toward one end of the drum. When the direction of rotation of said drum is reversed,'the said flanges will divert the contents toward the other end of the drum. This process of continually agitating the contents of the drum, the cones q and q throwing back the materials as they are directed toward the ends by the flanges r0 thoroughly mixes the ingredients in a very short time into a homogeneous mass, and the saving of time is important in mixing cement on account of the rapid setting of the same. ater during the mixing process enters the drum through the perforations t of the pipe 0.

Having described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. A cement-mixer, comprising a fixed perforated pipe, a rotatable drum thereon, having inwardly-projecting cones on its inner heads, and inwardly-projecting obliquely-set flanges fixed to the inner side of its cylindrical shell, substantially as described.

2. A cement-mixer, comprisinga fixed perforated pipe, a rotatable drum thereon, having inwardly-projecting cones on its inner heads, and inwardly-projecting obliquely-set flanges fixed to the inner side of its cylindrical shell, and a removable cover for said drum, substantially as described.

3. A cement-mixer, comprising a fixed perforated pipe, a rotatable drum thereon, having inwardly-projecting cones on its inner heads, and inwardly-projecting obliquely-set flanges fixed to the inner side of its cylindrical shell, and means for rotating said drum, substantially as described.

4. A cement-mixer, comprising a fixed per forated pipe, a rotatable drum thereon having inwardly-projecting cones on its inner heads, and inwardly-projecting obliquely-set flanges fixed to the inner side of its cylindrical drum, a pinion intermeshing with said gear- Wheel, means for rotating said pinion, inwardly-projecting cones fixed to the inner heads of said drum, inwardly-projecting obliquely-set flanges fixed to the inner side of the shell of said drum, a removable cover for said drum, and a movable truck for said drum, substantially as shown and described.

Signed at Waterloo, Iowa, this 29th day of June, 1905.

CHARLES L. BALDWIN. Witnesses:

M. E. KENNEDY, G. G. KENNEDY. 

